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Terminals Of Ecu

  1. Terminals of ECU 
    Fig 1: Identifying Skid Control ECU Connectors
    G04465223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINALS SYMBOLS AND DESCRIPTION

    Symbols (Terminal No.) Terminal Description
    GND 2 (1) Motor relay ground
    BM (2) Motor relay test input
    FR+ (3) Front RH wheel speed signal input
    FL- (4) Front LH wheel speed signal input
    RR+ (5) Rear RH wheel speed signal input
    RL- (6) Rear LH wheel speed signal input
    TRC+ (8) ECM communication output
    ENG+ (9) ECM communication input
    NEO (10) Engine revolution signal input
    CANH (11) CAN communication line
    SP1 (12) Speed signal output
    D/G (13) Diagnosis tester communication line
    MRF (14) Fail safe motor relay output
    MR (15) Motor relay output
    FR- (17) Front RH wheel speed signal input
    FL+ (18) Front LH wheel speed signal input
    RR- (19) Rear RH wheel speed signal input
    RL+ (20) Rear LH wheel speed signal input
    TRC- (22) ECM communication output
    ENG- (23) ECM communication input
    TS (24) Sensor check input
    CANL (25) CAN communication line
    STP (27) Stop light switch input
    PKB (28) Parking brake switch input
    WA (29) ABS warning light output
    BZ (30) Buzzer output
    +BS (31) Solenoid relay power supply
    GND1 (32) Skid control ECU ground
    IND (34) SLIP Indicator light output
    VSCW (36) VSC warning light output
    P (40) P range switch input
    WFSE (42) WFSE input
    CSW (43) TRAC OFF switch input
    BRL (44) BRAKE warning light output
    R+ (45) Power supply for motor relay
    IG1 (46) IG1 power supply
  2. Terminal Inspection 
    1. Disconnect the connector and measure the voltage on the wire harness side.
      Fig 2: Identifying Skid Control ECU Connectors
      G04465224Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Voltage can not be measured with the connector connected to the skid control ECU as the connector is water resistance.

      SKID CONTROL ECU CONNECTORS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BM (S1-2) - GND (S1-1, 32) B-R - W-L, W-B Motor relay test input IG switch ON, pump motor running 10 to 14 V
      TS (S1-24) - GND (S1-1, 32) GR - W-L, W-B Sensor check input IG switch ON 10 to 14 V
      STP (S1-27) - GND (S1-1, 32) G-W - W-L, W-B Stop light switch input Stop light switch ON (Brake pedal pushed) 8 to 14 V
      STP (S1-27) - GND (S1-1, 32) G-W - W-L, W-B Stop light switch input Stop light switch OFF (Brake pedal released) Below 1.5 V
      PKB (S1-28) - GND (S1-1, 32) R-W - W-L, W-B Parking brake switch input IG switch ON, parking brake switch ON Below 1.5 V
      PKB (S1-28) - GND (S1-1, 32) R-W - W-L, W-B Parking brake switch input IG switch ON, parking brake switch OFF 10 to 14 V
      +BS (S1-31) - GND (S1-1, 32) B - W-L, W-B Solenoid relay power supply Always 10 to 14 V
      WFSE (S1-42) - GND (S1-1, 32) P - W-L, W-B WFSE input IG switch ON 10 to 14 V
      CSW (S1-43) - GND (S1-1, 32) R-Y - W-L, W-B TRAC OFF switch input TRAC OFF switch OFF 10 to 14 V
      R+ (S1-45) - GND (S1-1, 32) R - W-L, W-B Power supply for motor relay IG switch ON 10 to 14 V
      IG1 (S1-46) - GND (S1-1, 32) B-W - W-L, W-B IG1 power supply IG switch ON 10 to 14 V
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